63906368 has 14 divisors (see below), whose sum is σ = 126814326. Its totient is φ = 31953152.

The previous prime is 63906347. The next prime is 63906389. The reversal of 63906368 is 86360936.

It is an interprime number because it is at equal distance from previous prime (63906347) and next prime (63906389).

It can be written as a sum of positive squares in only one way, i.e., 60341824 + 3564544 = 7768^2 + 1888^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499205 + ... + 499332.

Almost surely, 2^63906368 is an apocalyptic number.

It is an amenable number.

63906368 is a deficient number, since it is larger than the sum of its proper divisors (62907958).

63906368 is an equidigital number, since it uses as much as digits as its factorization.

63906368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998549 (or 998539 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 63906368 is about 7994.1458580639. The cubic root of 63906368 is about 399.8048381284.

The spelling of 63906368 in words is "sixty-three million, nine hundred six thousand, three hundred sixty-eight".